BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 1 |
CNW
| Chicago & Northwestern | 1 |
CSX
| CSX Railroad | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
FBOX
| TTX Company | 1 |
GTW
| Grand Trunk Western | 1 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 1 |
MILW
| Milwaukee Road | 2 |
MP
| Missouri Pacific | 1 |
NYC
| New York Central | 1 |
RBOX
| Railbox Company | 1 |
SCL
| Seaboard Coast Line | 7 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 2 |
TBOX
| TTX Company | 1 |
WC
| Wisconsin Central | 2 |
WP
| Western Pacific | 1 |